Helen was much kinder to her youngest child than she was to her other children ,（ ）naturally made them jealous.
A.正确答案Dwhat
B.who
C.that
D.which
Helen was much kinder to her youngest child than she was to her other children ,（ ）naturally made them jealous.
Helen was much kinder to her youngest child than she was to her other children ,（ ）naturally made them jealous.
A.正确答案Dwhat
B.who
C.that
D.which
